The memes "#abortionclinicplaylistsongs" and "#ghettocollegecourses" are at the top of Twitter's most talked about topics on September 10 at 7:30 AM GMT.

In third and fourth places are the terms used to discuss the fire raging through the San Francisco suburb of San Bruno in the USA, "#sanbrunofire" and "Bruno fire."

"Latest estimate is up to 45 homes," "San Mateo County Coroner on scene to examine bodies of deceased in San Bruno neighborhood," "My heart goes out to those who lost their homes" and "God bless the firefighters & the whole emergency response team battling against the #sanbrunofire," tweet users.

Former Microsoft executive Stephen "Elop" has been named as the new CEO at Nokia, the largest mobile phone maker in the world. His name has since risen into fifth place in Twitter's trending topics.

"Eid Mubarak," a Muslim holiday greeting often said at the end of Ramadan is in sixth place while "Aidin Wal Faidzin," an Arabic phrase also used as a holiday greeting, is in ninth place.

The name of Reverend "Terry Jones" is in seventh place on the charts after the Florida, USA-based pastor put his plans to burn the Koran on Saturday on hold, Google's real-time search "Google Instant" remains unchanged in eighth place, and "#StandUp2Cancer" is new in tenth place.

The top 10 most talked about topics on Twitter on September 10 at 7:30 AM GMT are:

  1. #abortionclinicplaylistsongs (new)
  2. #ghettocollegecourses (new)
  3. #sanbrunofire (new)
  4. Bruno fire (new)
  5. Elop (new)
  6. Eid Mubarak (re-entry)
  7. Terry Jones (new)
  8. Google Instant (unchanged)
  9. Aidin Wal Faidzin (new)
  10. #StandUp2Cancer (new)